The transfer and absorption of technology in the third world is a topic that has been discussed scientifically, culturally, politically and economically in developing countries, western research societies and international organizations. In this research, the identification and prioritization of the success criteria of technology transfer and development projects in the field of petrochemicals have been discussed. The research method in this research is applied based on the purpose, but descriptive based on the research method. A researcher-made questionnaire was used to collect information. n this research, it is a combination of two Delphi methods and the best-worst method to identify and prioritize the success criteria of technology transfer and development projects in the petrochemical field. In the field of success factors of technology transfer and development projects, 20 effective factors were identified and classified in 4 dimensions. The results of the research show that the criterion of economic achievements, the criterion of research of strategic goals, and the criterion of acquiring scientific and technological capabilities have won the first to third rank, respectively. Among the sub-criteria of economic achievements and impact on the market; Improving the economic indicators of the company, increasing the share and raising the quality of the products have been ranked first to third respectively. Among the sub-criteria of increasing technical power; Increasing the production capacity, developing new products and developing skills, and finally improving the future prospects have been ranked first to third respectively.